TCG120-4e 4G LTE wireless I/O module

TCG120-4e 4G LTE wireless I/O module
 TCG120-4e 4G LTE wireless I/O moduleTCG120-4e 4G LTE wireless I/O module 
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TCG120-4 is a 4G LTE wireless I/O module with MQTT support.

The wireless IO module is the successor of the popular TCG120. Unlike its predecessor, the TCG120-4 supports 4G LTE, 3G, and 2G communication and provides data connectivity in LTE-FDD, DC-HSDPA, HSPA +, HSDPA, HSUPA, WCDMA, EDGE, and GPRS networks.

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TCG120-4 is a 4G LTE wireless I/O module. In addition to the 4G, the device also supports 3G and GSM-GPRS, which makes it a good choice of a last-mile module that can communicate from a point with any mobile network coverage. The choice of communication technology is automatic by default but can be fixed during the setup.

The input/output peripherals of the device include 2 digital inputs, 2 analog inputs, and two relays with normally open and normally closed contacts. In addition, the module supports a 1-Wire interface to which up to 4 Teracom sensors can be connected.

The initial setup of the device is made through the graphical interface using a standard browser. On the field, the device can be set up remotely either with SMS or HTTP API commands. T

The device can operate in offline mode. In this mode, the relays can be activated by the alarm state of any of the monitored parameters – digital/analog inputs or sensors. In this way, the device can directly control some processes.

4G LTE wireless I/O module may be part of supervisory control and data acquisition (SCADA) systems. For this purpose, the supported protocols for M2M communication are used – HTTP API and MQTT.

In the case of HTTP API is used, the module periodically sends its whole status via XML or JSON file. While if MQTT is used, only a specific parameter can be sent. MQTT is optimized to work on networks with even the scarcest of bandwidth. More about MQTT can be read in our blog too.


  • 4G LTE, 3G, and 2G connectivity;
  • Setup via WEB interface through the USB;
  • 2 digital (”dry contact”) inputs;
  • 2 analog input with 0 to 60VDC range;
  • 2 relay output with normally open and normally closed contacts;
  • 1-Wire support for up to 4 Teracom sensors;
  • SMS alarm alerts (up to 5 numbers);
  • TLS over SMTP support;
  • Email alarm alerts (up to 5 email recipients);
  • GSM Geolocation*;
  • MQTT support;
  • Periodical HTTP Post with XML/JSON status file; 
  • Remote setup with HTTP API or SMS commands;
  • Firmware update over the air. 

4G LTE wireless I/O module applications

  • Remote control of street lighting;
  • Environmental monitoring of agriculture sites;
  • Remote control of railway facilities;
  • GSM geolocation of refrigerators;
  • Remote control of water pumps;
  • Remote monitoring and control of distant facilities

User Manual


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